The deal closed late April 13, allowing New York-based BGC to integrate Santa Ana-based Grubb with its Newmark Knight Frank division, another real estate company it acquired in 2011.

Grubb & Ellis had filed for Chapter 11 bankruptcy protection Feb. 20.

BGC received approval to move forward with the acquisition March 27 after a U.S. Bankruptcy Court approved the $30 million deal. Previously, there was a dispute concerning whether there should be an auction of the commercial real estate firm’s assets, but the court ruled that since no other companies submitted an offer higher than BGC’s, the acquisition could continue.

Newmark Grubb Knight Frank will have more than 100 offices in North America, 250 million square feet in property and facilities management and a national appraisal business, according to BGC.

Grubb & Ellis was Silicon Valley’s fifth-largest industry player based on number of agents, 43, according to Business Journal research. The company recorded 355 transactions in commercial, industrial and retail leasing for 2011, and the number of exclusive listings that year was 143.